ui: Fixup loaded state

app-common/src/main/java/im/angry/openeuicc/ui/wizard/DownloadWizardActivity.kt

@@ -80,7 +80,7 @@ class DownloadWizardActivity: BaseEuiccAccessActivity() {
             } else {
                 View.GONE
             }
-            prevButton.visibility = if (it.hasNext) {
+            prevButton.visibility = if (it.hasPrev) {
                 View.VISIBLE
             } else {
                 View.GONE

app-common/src/main/java/im/angry/openeuicc/ui/wizard/DownloadWizardSlotSelectFragment.kt

@@ -79,6 +79,7 @@ class DownloadWizardSlotSelectFragment : DownloadWizardActivity.DownloadWizardSt
         adapter.slots = slots
         adapter.notifyDataSetChanged()
         hideProgressBar()
+        loaded = true
         refreshButtons()
     }